Incubator.



Patented July 9, 1918.

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lNCUBATOR.

APPLICATION FILED Aue 24. I916.

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WITNESSES fo 5 4; 6M Q44 h E. D. CHARTERS.

INCUBATOR.

APPLICATION FILED Aue.24. 191s.

Patented July 9, 1918.

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E. D; CHARTERS.

INCUBATOR.

APPLICATION FILED AUG.24. 1916.

Patented July 9, 1918,

-3 SHEETSSHEET 3.

IN VEN TOR ERNEST D. CHARTERS, or TURLooK, CALIFORNIA.

INCUBATOR.

cubators, and has for its object to provide a new and improved means for controlling the temperature of the incubator, wherein the supply of heat is controlled by the difference of the outside and the inside temperature, by varying the size of the flame, without the use of dampers or the like.

.In the drawings: Figure 1 is a perspective view of the improved incubator.

Fig. 2 is a partial longitudinal vertical section.

Fig... 3 is an enlarged sectional View through the burner. I

Fig. 4 is a perspective view of the burner with the controlling shutters open- Fig. 5is a similar View with the shutters closed.

Fig. 6 is a diagrammatic end view of the burner.

Fig. 7 is a horizontal section through the heating pipes.

Fig. 8 is a vertical section through the said pipes.

Fig. 9 is a section on the line 9-9 of Fig. 5.

Fig. 10 is a diagrammatic View of a moisture indicatng mechanism. In the present embodiment of the invention, an incubator 1 is provided of the usual form, which is supplied with heat from'a lamp 2 having a burner 3, and a wick 4. The lamp is provided with the usual flue or chimney 5 of tapering form, and having its upper or small end engaging the lower end of a heavy iron pipe 6. This pipe 6 eX- tends upwardly alongside the incubator, and a lighter or thinner continuation 6 of the pipe extends through the incubator wall. The pipe 66 is inclosed by a pipe 7-7 and the pipe 77 is inclosed by a casing 88 the portions 7 and 8 of the pipe 77 and 88 being vertical, while the portions 8 are horizontal, extending into the incubator and inclosing the portion 6 -of the pipe 6-6. The inner end of the portion 7 of the pipe 77 is open and the said Specification of Letters Patent.

Patented July 9, 19 18.

Application filed August 24, 1916. Serial No. 116,755.

pipe is also provided with discharge openings 9 ad acent to the said open inner end.

The outer end of the pipe 7-7 is also open,

but the ends of the pipe 88 are closed as shown, and the ends of the said pipe stop short of the ends of the pipe 7-7. The heated air passes upward through the pipe 66 and enters the incubator, passing along the said pipe 6, until the pipe branches into branches 6 and these branches extend toward the opposite end of the incubator casing in diverging relation, and are then bent sharply backward, as shown at 6 in parallel relation, toward the first named end of the incubator, where they extend upward opening through the top of the incubator, as indicated at 10, delivering to the atmosphere.

The fiameof the wick 4 in the burner 3 is controlled by a pair of shutters 11 and 12 respectively, each of the said shutters being secured at its lower side edge to a shaft 13 and 14 respectively, in such manner that when the shafts are oscillated, the shutters will be simultaneously moved toward and from the flame of the wick, and the upper ends of the said shutters are bent or curved inwardly, as shown, to contact when they are completely closed above the upper end of the wick, cutting ofi the flame as indicated in Fig. 6. The shafts 13 and 14 are journaled in the casing of the burner, and the shaft 13 is provided with an operating arm 15, having interposed in its length a loop 16, and this loop is engaged by an arm 17 p on the shaft 14 in such manner that when the arm 15 is raised, the shut ters will be opened, while when the said arm is lowered, the shutters will be closed.

The operating arm 15 is provided at its outer end with a hook which engages an opening in the lower end of the plate 18, the said plate having at its upper end a series of nine openings, so arranged, that the openings are spaced unequal distances from the opening for the arm. A link 19 is provided with a hook for engaging in one of the openings at the top of the plate, and the upper endof the link is connected with the controlling mechanism for controlling the movement of the arm 15 and the shutters.

It will be noticed from an inspection of Figs. 4 and 5, that the shutters are provided with perforations near their lower edge, and a pilot burner is arranged at one end of the JeXtends beyond the end-of the incubator burner 3. This pilot burner is a small independent wick 20 arranged at one endof the burner 3 and extendinginto the oil of the lamp, and separately controlled so far as raising and lowering is concerned. The

shutters 11 and 12 are notched at the corner adjacent to the wick 20, as indicated at 21 and 22 respectively, and an angle plate 23 is adjustably connected with the shutter 12 at the notch 22 in such manner that it may be moved longitudinally of the upper edge of the shutter.

One of the portions of the. angle plate extend perpendicularly inward toward the shutter 11, in such manner that when the shutters are approached, this portion will extend between the wicks, shutting off the flame of the pilot burner from the wick 4. The plate 23 has a longitudinally extend ing slot, and set screws 24 pass through the slot to adjustably connect the angle plate with the shutter.

The temperature controlled mechanism for the shutters consists of a thermostat 25 of usual construction, arranged within theincubator casing, whose regulating rod 26 extends through the top of the incubator casing and is adjustably connected with a lever 27 as indicated at 28. .This lever is pivoted on the top of the casing, and a counterweight29 is adjustably mounted on the lever. The opposite end of. the lever casing, and a link 30 connects'the said end with the endof the uppermost of a pair of parallel levers 3132. The lever31 is pivoted intermediate its ends to the bottom of the casing, as indicated at 33, and the lever 32 is connected to the lever 31 at their inner ends by a link 34 and near their outer ends by a thermostat35.

The link 19 before mentioned, is connected with the outer end of the lever 32,

and the inner end of the said lever is weighted by a cup 36 of mercury. It will beevident that since the thermostat 35 is outside the casing and the thermostat 25 is inside the casing, the flame of the burner will be controlled by differences in temper ature in both the inside and the outside. When the outside temperature rises or falls, the link 19 will operate the shutters to open or close the same, and the extent of move ment of the operating arm 15 will depend upon the difference between the movements of the levers 27 and 32.

The cup 36 of mercury, is intende'd to counterbalance the parallel bars 31 and 32 in such manner that they will be acted upon by the thermostat 35. As is known, the more nearly the temperature of an incubator can be held at 103, thegreater the hatch, and the more hardy the chicks. The thermostat holds the internal temperature of the incubator at the same point, regardless of the opening or closing of the doors,

ordinary manner,-while the pilot burner. is

separately controlled, beingraised by a .pair

of tweezers or the like. The heat'ed air passing upward through the tapering flue v5, enters the pipe 66 and passes through the incubator into the atmosphere. The atmospheric air is drawn in through the pipe 77 and is discharged into the incubator. The casing 88 is merely a jacket to assist in conserving the heat. Should, for in stance, the temperature rise to such a point that it is necessary to entirely shut off the flame, the pilot burner will still burn, and when the shutters are'opened .by a fall in temperature, the wick 4 will be ignited by the pilotburner. wick will be entirely controlled by the tem: perature through theshutters.

In Fig. 10 is shown a moisture indicating mechanism, the said mechanism comprising a pair of parallel bars 37 and 38 pivotallyconnected atone end; by a link 39, and 'the outer ends of the said bars. extend through.

the incubator wall, the bar. 38 being 'fiXGd.

Thusthe flame of the and the bar- 37 moving in a slot 40 in the wall. Controlling -mechanism 41 forthe bar 37 is arranged between the bars near.

their inner ends for operating the bar 37 and the said controlling mechanismv com= prises a series of treated cardboard disks glued together and secured to and-resting upon the end of the bar- 38, and the bar 37 rests upon the upper end of the series of disks, and it will be evident that when the disks absorb moisture, the cylinder formed by the disks, will fexpand raising the-bar 37. The outer end of the said bar is pointed,-

asan indicator, and cooperates witha scale 42 supported by the bar 38. This scalecarries a series of numerals and legends Wet? and Dry. When the cylinder 41 absorbs moisture, the bar 37 will'move toward the legend Wet, while when the disk dries out the bar will move toward thelegend Dry, and the numerals 1 to 5 inclusive arranged successively, will indicate the rela tive amount of moisture.

I claim:

a lever mounted on the casing with which ing, a link pivotally connecting the inner;

ends of the levers, a thermostat arranged between the levers near their outer ends, a link connecting the outer end of the uppermost lever with the first named lever, a burner and a connection between the outer end of the lowermost lever of the pair and the burner for controlling the said burner.

2. In an incubator, the combination with the casing, of a thermostat within the same, a lever operated thereby, a pair of superposed parallel levers suspended from the casing, the uppermost lever being connected to the first named lever at one end, a burner, a connection between the adjacent end of the lowermost lever and the burner for controlling said burner, and a therm0- stat between the parallel levers.

' at one end thereof a pilot burner, a pair of shutters movable toward and from the flame of the main burner and having a partition plate adapted to extend between the pilot burner and the main burner when the shutters are closed, an operating arm for simultaneously moving the shutters in opposite directions, and thermostats inside the incubator and outside the same, and connected with the said arm for permitting either thermostat to control the said arm.

4:. In an incubator, a main burner having at one end'thereof a pilot burner, a pair of shutters movable toward and from the flame of the main burner and having a partition plate adapted to extend between the pilot burner and the main burner when the shutters are closed, an operating arm for simultaneously moving the shutters in opposite directions, and a thermostat for controllingv ERNEST D. CHARTERS.

Witnesses ANNA SORENSEN, ROMA BURTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

